Auth bypass in Turms-Im Turms
CVE-2025-66911
Turms IM Server v0.10.0-SNAPSHOT and earlier contains a broken access control vulnerability in the user online status query functionality. The handleQueryUserOnlineStatusesRequest() method in UserServiceController.java allows any authenticated user to query the online status, device information, and login timestamps of arbitrary users without proper authorization checks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Turms-Im Turms — versions 0.10.0-snapshot
Weakness classification (CWE)
References
- github.com/turms-im/turms (Product)
- github.com/turms-im/turms/blob/develop/turms-service/src/main/java/im/turms/ser… (Product)
- github.com/Xzzz111/public_cve_report/blob/main/CVE-2025-66911_report.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-66911?
- CVE-2025-66911 is a medium-severity vulnerability in Turms-Im Turms, classified under Improper Access Control. CVSS score: 6.5/10. Published 2025-12-19.
- How severe is CVE-2025-66911?
- Medium severity. CVSS v3 base score is 6.5 out of 10.